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import argparse

import txaio
txaio.use_twisted()

from twisted.internet import reactor

import autobahn

from autobahn.twisted.websocket import connectWS, WebSocketClientFactory, \
    WebSocketClientProtocol

from autobahn.websocket.compress import PerMessageDeflateOffer, \
    PerMessageDeflateResponse, PerMessageDeflateResponseAccept


class TesteeClientProtocol(WebSocketClientProtocol):

    def onOpen(self):
        if self.factory.endCaseId is None:
            self.log.info("Getting case count ..")
        elif self.factory.currentCaseId <= self.factory.endCaseId:
            self.log.info("Running test case {case_id}/{last_case_id} as user agent {agent} on peer {peer}",
                          case_id=self.factory.currentCaseId,
                          last_case_id=self.factory.endCaseId,
                          agent=self.factory.agent,
                          peer=self.peer)

    def onMessage(self, msg, binary):
        if self.factory.endCaseId is None:
            self.factory.endCaseId = int(msg)
            self.log.info("Ok, will run {case_count} cases", case_count=self.factory.endCaseId)
        else:
            self.sendMessage(msg, binary)


class TesteeClientFactory(WebSocketClientFactory):

    protocol = TesteeClientProtocol

    def __init__(self, url):
        self.agent = autobahn.twisted.__ident__
        WebSocketClientFactory.__init__(self, url, useragent=self.agent)

        self.setProtocolOptions(failByDrop=False)  # spec conformance

        # enable permessage-deflate WebSocket protocol extension
        offers = [PerMessageDeflateOffer()]
        self.setProtocolOptions(perMessageCompressionOffers=offers)

        def accept(response):
            if isinstance(response, PerMessageDeflateResponse):
                return PerMessageDeflateResponseAccept(response)

        self.setProtocolOptions(perMessageCompressionAccept=accept)

        # setup client testee stuff
        self.endCaseId = None
        self.currentCaseId = 0
        self.updateReports = True
        self.resource = "/getCaseCount"

    def clientConnectionLost(self, connector, reason):
        self.currentCaseId += 1
        if self.currentCaseId <= self.endCaseId:
            self.resource = "/runCase?case={}&agent={}".format(self.currentCaseId, self.agent)
            connector.connect()
        elif self.updateReports:
            self.resource = "/updateReports?agent={}".format(self.agent)
            self.updateReports = False
            connector.connect()
        else:
            reactor.stop()

    def clientConnectionFailed(self, connector, reason):
        self.log.info("Connection to {url} failed: {error_message}", url=self.url, error_message=reason.getErrorMessage())
        reactor.stop()


if __name__ == '__main__':

    parser = argparse.ArgumentParser(description='Autobahn Testee Client (Twisted)')
    parser.add_argument('--url', dest='url', type=str, default=u'ws://127.0.0.1:9001', help='The WebSocket fuzzing server URL.')
    parser.add_argument('--loglevel', dest='loglevel', type=str, default=u'info', help='Log level, eg "info" or "debug".')

    options = parser.parse_args()

    txaio.start_logging(level=options.loglevel)

    factory = TesteeClientFactory(options.url)

    connectWS(factory)
    reactor.run()